oj.uz

Submission #772098

# Submission time Handle Problem Language Result Execution time Memory
772098 2023-07-03T15:56:41 Z VMaksimoski008 XORanges (eJOI19_xoranges) C++14
100 / 100
 114 ms 17272 KB 
#include <bits/stdc++.h>
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define pii pair<int, int>
#define pll pair<long long, long long>
#define debug(x) cout << #x << " = " << x << endl
#define pb push_back
#define eb emplace_back
using ll = long long;
using ull = unsigned long long;
using ld = long double;
const int mod = 1e9 + 7;
using namespace std;

void setIO() {
    ios_base::sync_with_stdio(false);
    cout.tie(nullptr);
    cin.tie(nullptr);
}

struct SegTree {
    int n;
    vector<ll> v;
    vector<ull> tree;

    SegTree(vector<ll> const &v) {
        this->n = sz(v);
        this->v = v;
        tree.resize(4*sz(v) + 5);
        build(1, 0, n-1);
    }

    void build(int node, int l, int r) {
        if(l == r) {
            tree[node] = v[l];
        } else {
            int mid = (l + r) / 2;
            build(2*node, l, mid);
            build(2*node+1, mid+1, r);
            tree[node] = tree[2*node] ^ tree[2*node+1];
        }
    }

    ull query(int node, int tl, int tr, int l, ll r) {
        if(l > r) return 0;
        if(l == tl && r == tr) return tree[node];

        int tm = (tl + tr) / 2;
        return query(2*node, tl, tm, l, min(r, 1ll*tm)) ^ query(2*node+1, tm+1, tr, max(l, tm+1), r);
    }

    void update(int node, int l, int r, int pos, ll val) {
        if(l == r) {
            tree[node] = val;
            v[l] = val;
        } else {
            int mid = (l + r) / 2;
            if(l <= pos && pos <= mid)
                update(2*node, l, mid, pos, val);
            else
                update(2*node+1, mid+1, r, pos, val);
            tree[node] = tree[2*node] ^ tree[2*node+1];
        }
    }
};

int main() {
    setIO();

    int n, q;
    cin >> n >> q;

    vector<ll> v(n), even, odd;
    for(int i=0; i<n; i++) {
        cin >> v[i];
        if(i % 2 == 1) even.pb(v[i]);
        else odd.pb(v[i]);
    }

    SegTree tree1(odd), tree2(even);
    while(q--) {
        int t, a;
        ll b;
        cin >> t >> a >> b;

        if(t == 1) {
            if(a % 2 == 1)
                tree1.update(1, 0, sz(odd)-1, a/2, b);
            else
                tree2.update(1, 0, sz(even)-1, a/2-1, b);
        } else {
            if((b - a + 1) % 2 == 0) cout << 0 << '\n';
            else {
                if(a % 2 == 1)
                    cout << tree1.query(1, 0, sz(odd)-1, a/2, b/2) << '\n';
                else
                    cout << tree2.query(1, 0, sz(even)-1, a/2-1, b/2-1) << '\n';
            }
        }
    }

    return 0;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 1 ms 328 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 328 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 3 ms 724 KB Output is correct
12 Correct 3 ms 724 KB Output is correct
13 Correct 2 ms 740 KB Output is correct
14 Correct 3 ms 724 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 112 ms 12968 KB Output is correct
2 Correct 108 ms 12788 KB Output is correct
3 Correct 114 ms 12848 KB Output is correct
4 Correct 97 ms 12796 KB Output is correct
5 Correct 92 ms 12728 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 320 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 328 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 3 ms 724 KB Output is correct
12 Correct 3 ms 724 KB Output is correct
13 Correct 2 ms 740 KB Output is correct
14 Correct 3 ms 724 KB Output is correct
15 Correct 112 ms 12968 KB Output is correct
16 Correct 108 ms 12788 KB Output is correct
17 Correct 114 ms 12848 KB Output is correct
18 Correct 97 ms 12796 KB Output is correct
19 Correct 92 ms 12728 KB Output is correct
20 Correct 96 ms 17256 KB Output is correct
21 Correct 98 ms 17272 KB Output is correct
22 Correct 102 ms 17232 KB Output is correct
23 Correct 96 ms 17120 KB Output is correct
24 Correct 100 ms 17216 KB Output is correct